Nico Rosberg has conceded it is up to him to find the 'little bit more' he needs to get the better of Lewis Hamilton having struggled to match his team-mate in 2015.

Rosberg has been out-qualified and out-raced by Mercedes' Lewis Hamilton in each of the opening three events in 2015, extending a run of form that has seen him finish behind the defending champion in nine of the last ten races.

With Rosberg making an outburst in the wake of the Chinese Grand Prix after feeling as though Hamilton played tactics to put him under pressure from Sebastian Vettel - an accusation the Englishman and the Mercedes team dismissed - the German comes to Bahrain under pressure to perform.

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Indeed, last year's runner-up admits he must be the one responsible for upping his game and taking the challenge to Hamilton.

"China was a frustrating weekend for me and I'm glad we have another race right away to get straight back to work. The team has made a great start to the season and, with this incredible car they have built, I know I just need to find a little bit more in myself to get back to the top step.

"I've never won in Bahrain but I've taken the last two pole positions here and also set the fastest lap at this circuit on my Formula One debut, so I know I have the pace. Of course, everyone remembers the race last year and it would be great for the fans if we can put on another great show for them this time. If we can do that but with the two top steps in a different order it would be fantastic!

"It won't be so easy with the competition breathing down our necks. But that makes for even more exciting racing, so I'm looking forward to a great battle and I'm determined to come out on top."

Ignoring Hamilton's DNFs in Australia, Canada and Belgium last season, Rosberg has beaten his team-mate on track in just three of the last 22 races.